Super PAC backing GOP's Jeb Bush on air with $24-million campaign in Iowa, New Hampshire

The super PAC created to support Republican Jeb Bush's presidential campaign is on the air in early voting primary states with a $24 million television ad buy. The ads will remain on the air through the end of the year.

Aides to Right to Rise USA say the 30-second spot casting the former Florida governor as a "proven conservative" with "real results" is airing in Iowa and New Hampshire, which hold the first voting of the 2016 campaign. The ad begins airing in South Carolina next week.

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Bush is trying to move ahead of billionaire Donald Trump and retired neurosurgeon Ben Carson in national Republican polls.